Beta 4 was terrible for me. So many reboots and trouble connecting to the phone.
I just got the Watch, and I wanted to evaluate the OS without any beta bugs. Now I'm curious about the version 2 features. Is beta 5 mostly free of show-stopping bugs as far as you can tell?
As to the modular face, they could make the modules a little smaller in order to fit in a couple more modules--the more info in one view the better.